This panel would then be connected through a patchbay to a microphone, line and program amplifiers, equalizers and echo sends.

A second equalizer and adjuster circuit to equalize the timed sample sequence for detection and to adjust the gain of the amplifier and the timing of the sampler operates in a user data segment of the signal.

By separating the equalization of the signal to separate equalizers, the cost of the equalization can be reduced without substantially affecting performance.